Update OWNERS.

Test: N/A
Change-Id: I290fe43ee14fa3751f9ddb2c009bff235d8e1cff
diff --git a/OWNERS b/OWNERS
index b3f11dc..fe1c33d 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,4 @@
 enh@google.com
-tbao@google.com
+nhdo@google.com
 xunchang@google.com
+zhaojiac@google.com